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- W1594865953 abstract "Summary Given that aggressive DNA damaging chemotherapy shows suboptimal efficacy in chronic lymphocytic leukaemia (CLL), alternative therapeutic approaches are needed. Tumour necrosis factor‐related apoptosis‐inducing ligand (TRAIL) is able to induce tumour‐specific apoptosis. However, apoptosis might be inhibited by elevated levels of X‐linked inhibitor of apoptosis (XIAP). Use of XIAP‐inhibiting compounds might sensitize primary CLL cells towards TRAIL‐mediated apoptosis. A novel small molecule, compound A (CA), an inhibitor of XIAP, was used in combination with TRAIL to induce apoptosis in primary CLL cells ( n = 48). XIAP was significantly more highly expressed in primary CLL cells ( n = 28) compared to healthy B cells ( n = 16) ( P = 0·02). Our data obtained by specific knock‐down of XIAP by siRNA identified XIAP as the key factor conferring resistance to TRAIL in CLL. Combined treatment with CA/TRAIL significantly increased apoptosis compared to untreated ( P = 8·5 × 10 −10 ), solely CA ( P = 4·1 × 10 −12 ) or TRAIL treated ( P = 4·8 × 10 −10 ) CLL cells. CA rendered 40 of 48 (83·3%) primary CLL samples susceptible to TRAIL‐mediated apoptosis. In particular, cells derived from patients with poor prognosis CLL (ZAP‐70 + , IGHV unmutated, 17p‐) were highly responsive to this drug combination. Our highly‐effective XIAP inhibitor CA, in concert with TRAIL, shows potential for the treatment of CLL cases with poor prognosis and therefore warrants further clinical investigation." @default.
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- W1594865953 date "2010-11-23" @default.
- W1594865953 modified "2023-10-18" @default.
- W1594865953 title "Novel X-linked inhibitor of apoptosis inhibiting compound as sensitizer for TRAIL-mediated apoptosis in chronic lymphocytic leukaemia with poor prognosis" @default.
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- W1594865953 doi "https://doi.org/10.1111/j.1365-2141.2010.08426.x" @default.
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